Disable doctests on mac because of old bash

      TESTABLES="$TESTABLES ${RST_FILES[*]}"

    fi

    # macOS bash is too old for mapfile: Oh well, no doctests on mac.

    if [ "$(uname)" != "Darwin" ]; then

      mapfile -t DOCTEST_MODULES < <( git grep -l doctest -- ":(glob,top)$AK_PROJ_NAME/**/*.py" )

      TESTABLES="$TESTABLES ${DOCTEST_MODULES[@]}"

    fi

  fi

  if [[ -n "$TESTABLES" ]]; then

    echo "TESTABLES: $TESTABLES"